Log Message:
gimp: update to 2.10.2.

Overview of Changes from GIMP 2.10.0 to GIMP 2.10.2
===================================================

Core:

  - Discard fonts which fail to load and popup an info dialog to allow
    people debug their fonts.
  - New API to suppress updates in UI until plug-ins are done
    introducing changes.
  - New API to calculate histograms in separate threads, with possible further
    extension to handle similar cases elsewhere in GIMP.
  - Tool options are now properly saved and reloaded per-device at
    startup.

Plug-ins:

  - New plug-in for importing and exporting HEIF images.
  - Enable visibility of rasterized vector layer from PSD.
  - Single-window screenshots in Windows fixed to correctly snap a
    window even when it is partly off-screen or covered by another
    window or when display scaling is not set to 100%.

Filters:

  - New Spherize filter to wrap an image around a spherical cap
  - New Recursive Transform filter to create Droste effect.

Usability:

  - Warn users, when alpha-only painting has no effect. E.g. when target
    drawable doesn't have an alpha channel, or the alpha channel is locked.
  - Make the splash texts dynamic, so they are larger on larger splashes.
  - Mention pressing Enter to complete Foreground selection in the status bar.
  - Make sure that clicking outside any selection prevents Rectangle Select
    and Ellipse Select tools from creating empty selections.
  - Improve mouse wheel zooming behavior to keep the same point
    centered under the pointer even if the image is completely visible
    in the canvas.
  - Add "View -> Center Image in Window" (Shift+J) as a quick way to
    center the image at any zoom level.

Translations:

  - Updated translations: Catalan, Danish, Dutch, French, German, Greek,
    Hungarian, Icelandic, Italian, Latvian, Polish, Russian, Spanish,
    Swedish, Ukrainian.
  - New translation of Windows installer: Chinese (Taiwan)

Build:

  - Add a --with-bug-report-url configure option allowing packagers to
    set the address of their own bug tracker. This address will be the
    one opened by the debug dialog for reporting bugs.
  - Add a flatpak manifest for the gtk3-port branch.
  - Remove the possibility to disable script-fu.
  - Add a --with-icc-directory configure option to customize the color
    profile directory. By default, it is set to the common path
    /usr/share/color/icc.

Documentation:

  - Updating the description of the XCF format "devel-docs/xcf.txt", for
    third-party readers wishing to support GIMP 2.10 XCF files.
  - Add documentation skeletons for all enums in libgimpbase/, there is
    much room for improvement.